Hydraulic deep-well pump



Aug. 16, 1938. R. u. GRANT HYDRAULIC DEEP WELL PUMP 2 Sheets-Sheet 1 Original Filed July 23, 1956 awe/WM RUGranZ Aug. 16, 1938. r GRANT 7 2,127,168

HYDRAULIC DEEP WELL PUMP Original Filed July 2:5, 1936 2 Sheets-Sheet 2 Patented Aug. 16, 1938 UNITED STATES PATENT OFFICE Application July 23, 1936, Serial No. 92,237 Renewed February 5, 1938 4 Claim.

This invention relates to pumps and particularly to deep-well hydraulic pumps wherein the piston of the pumping mechanism .in the working barrel of the well is reciprocated by the liquid 6 being pumped, the power liquid used to operate the piston in the working barrel being in turn forced in one direction or the other by a pump located at the ground level.

One of the objects of the invention is to provide a structure of this character which is extremely simple, and has no parts liable to get out of order.

Another object is to provide a structure of this character which includes two pistons located within the working barrel of the pump, the power liquid forced into the working barrel by the ground pump operating alternately against one of .the other of said pistons to thereby reciprocate the pair of pistons and cause a constant discharge of liquid from the well.

A further object is to provide a closed system for the passage of the liquid being pumped, the power liquid being taken to the power or ground pump from a storage tank while the liquid ejected by the pump pistons in the working barrel is 55 forced into said storage tank.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawings wherein:

l0 Figure 1 is a diagrammatic elevation of the pumping mechanism at the ground surface of the well, the reciprocating valve being shown in section;

Figure 2 is a fragmentary vertical section l5 through the well casing and showing the submerged portion of the pu nping mechanism.

Referring to the drawings, to designates the well casing. Disposed within this well casing is the working barrel formed of three sections, ll, L0 H and II, and supported therein an any suitable manner. The lower end 01' the working barrel is provided with the usual strainer l2 having perforations ll. Above this strainer, the working barrel is provided with the valve seat ll,

L5 and resting upon this valveseat is the ball valve" it which opens upwardly. Receiving the upper end of the lower section I I of the working barrel is an element l6 constituting a septum or partition having therein the packing gland l1. Eni0 gaging the upper end of the middlesection ll of the working barrel -'is a valve casing l8,- whose central portion supports the upper section li of the working barrel, this central portion being provided with a packing gland is. The upper i5 end of the working barrel is provided with a check valve 20. Operating through the glands I1 and I9 is a tubular piston rod 2|, the upper end of the piston rod being open and discharging into the upper section H of the working barrel.

The lower end of the rod 2! carries upon it the 6 piston 22 provided with the usual packing. That portion of the piston rod 2| which passes through the section i l of the working barrel carries on it a piston 29. The piston is annular in form to provide a valve seat 23 upon which is disposed the upwardly Opening valve 24. This piston 22 reciprocates within the lower section of the working barrel I I. The valve l5 constitutes the lower intake valve.

Extending'downward into the well casing is a power line 25 which communicates, as will be later described, with a valve casing and with a power operated pump on the surface of the ground. The power line 2'5 extends downward into the element i6 which forms a coupling between the sections l I and I I of the working barrel. This coupling member I6 is provided with a passage 26 into which the power line discharges, this passage communicating with the space above the piston 22. The power line 25 25 is also provided with a branch 21 which opens a into the valve casing l8. This valve casing is provided with the upwardly opening upper discharge valve 28 which permits liquid from above the piston 28 to be discharged upward into the branch 30 21 upon an upward movement of the piston 29.=

A second power line designated 30 extends.

downward from the ground level and at its lower end opens into the coupling it, as at 3|, and thus opens into the space below the piston 29. The

valve chamber I8 is provided with an inwardly opening valve 32 coacting with a seat 33. This constitutes an upper intake valve. The power line 30 is connected by a branch 34 to the upper end 01' the upper section ll of the working bar rel,. the upper end of this upper section being provided with the check'valve 20, as before described. I

At the surface of the ground, that is associated with the upper end of the well casing i0 and 'dis- .15

25 while port 38 communicates with the power line 30. Between these two ports 31 and 38, a discharge port 39 is formed which is connected by a pipe 40 to the upper end of a storage tank 4|. From the lower end-oi this storage tank leads a supply pipe 42 which communicates with a valve casing 43. This communicates with a manifold 44 and the port between the casing 43 and the manifold is normally closed by a downwardly opening valve 45. The manifold 44 has a port opening into the valve casing 46 which communicates by a pipe 4'! to the interior of the valve casing 35. An upwardly opening check valve 48 permits the passage of the liquid from the manifold 44 into the casing 46 but prevents the reverse passage of liquid. The valve 45 permits the passage of liquid from the valve casing 43 into the manifold but prevents the reverse movement of the liquid.

Associated with the manifold 44 is a pump cylinder 49 having therein a piston 50, there being communication between the pump cylinder 49 and the manifold 44. Upon the retraction of the piston 50, liquid will be drawn into the pump cylinder and upon a reverse movement of the piston, liquid will be forced out through the manifold into the pipe 41.

While I do not wish to be limited to the particular means for operating the piston 50, I have shown the piston rod 5| as being connected by a rod 52 to a wrist pin on a gear wheel 53 which may be motor driven. For the purpose of shifting the valve 36, I provide a valve rod 54 extending through the casing 35. This rod is reciprocated by means of a Scotch yoke 55 or any equivalent construction, the yoke in turn being oscillated by means of the cam or eccentric 5B carried by the shaft of a gear wheel 51. The yoke is pivoted at 58. The gear wheel 51 is driven by a pinion 59 carried upon the shaft of a gear wheel 60 which is driven by an intermediate gear wheel 6| from the gear wheel 53. While I have illustrated a particular valve operating means which I have found to be singularly effective, I do not wish to be limited to this specific means except as defined in the appended claims.

As illustrated in Figure 1, the D-valve 38 is disposed to connect the ports 31 and 39, while the port 38 is in communication through the valve casing 35with the pipe 41. The piston 5| is moving in the direction of the arrow in Figure 1, and, therefore, liquid is being forced past the valve 48 through the pipe 41 into the valve casing 35 and down the power line 30. Liquid cannot pass into the upper end of the working barrel by reason of the check valve 28 and, therefore, liquid is forced downward through the pipe 30 into the space below the piston 29, forcing this piston upward, as shown by the arrow in Figure 2. The check valve 32 is closed by the pressure within the valve casing 3 above the piston 29 and the liquid above piston 29 is forced out through the valve 28 into the line 25 and thus to the storage tank. While the piston 29 and its piston rod 2| is moving upward, the piston 22 will draw oil or other liquid into the lower section H of the working barrel.

Upon a reverse movement of the piston 5!, that is, the movement of the piston toward the left in Figure 1, the D-valve 36 is shifted to connect the port 38 to the storage tank discharge port 39 and connect the port 31 to the pipe 41. Upon the reverse movement of this piston 5|,

. liquid is drawn from the chamber 43 into the the power liquid passes downward into the space above the piston 22. This causes the descent of the piston 22 with the piston rod 2 I,

It will be understood, of course, that upon the upward movement of the piston 22 previously described, liquid will flow past the valve l5 into the section II. 22, the pressure of this liquid will open the valve Upon a'descent of the piston 24 and cause the liquid to be discharged through the tubular piston rod 2| into the upper section of the working barrel and past the check valve 22 and thus into the storage tank. While the piston 22 is descending and delivering liquid through the piston rod 2i, the piston 29 isalso descending, forcing the liquid below this piston into the line pipe 30 and -lfawing in liquid through the upper intake valve seat 33 and past the valve 32 into the space above the piston 29. Thus upon a stroke of the piston rod 2| in a downward direction, liquid will be delivered into through the port 3|, while upon a reverse movement of the piston rod 2|, the liquid above the j piston 22 will be forced upward throught the port 26 and the other power line 25 and. well liquid will be forced upward by the piston 29 into. this Thus, upon each reciprocation, the power liquid previously used to force the piston line 25.

in one direction will be returned to the storage tank and liquid from the well will also be forced into the storage tank.

While I have illustrated a certain detailed arrangement of the valves 28 and 32 and the valve 24 with its casing, I do not wish to be limited to this arrangement as obviously the valves might be differently arranged and yet secure the same result, though I believe the arrangement as shown, Neither do I wish to be limited to the details of construction as illustrated, it being understoodlack of wear permits cheaper motor power to be I used as my pump cannot mud or paraffin up the well. The load is always balanced. This pumping mechanism can be operated with oil or water,

If pumping an oil well, crude oil is used, and water is, of course, used in a water well. tual practice, this mechanism has been found to pump water at less than one cent per thousand gallons.

What is claimed is: I

1. A deep-well pumping system, including three cylinders disposed one above the other, the. lower cylinder having an inlet valve at its lower end, the uppermost cylinder having an outlet valve at its upper end and the intermediate cylinder having an inlet valve at its upper end, two power pipe lines, one extending into the upper end of the lowest cylinder and having a branch extending into the upper end of the intermediate cylinder, an upwardly opening check valve in this branch, the other power pipe line opening into thelower end of the intermediate cylinder and having a branch opening into the upper end of the uppermost cylinder, a tubular piston to be a preferable arrangement,

It has a,

In ac- 20 one power line through the piston 21 and also 1 rod extending from the interior of the lowermost cylinder through the intermediate cylinder and into the interior of the uppermost cylinder, a piston on the lower end of the rod and operating within the lowermost cylinder, a piston on the intermediate portion of the rod and operating within the intermediate cylinder, an upwardly opening valve at the lower end of the tubular piston rod, a storage tank above the ground level, and means for forcing liquid under pressure from the storage tank alternately into one or the other of the pipe lines and discharging liquid from the other pipe line into the storage tank.

2.'A deep-well pumping system, including a well casing, a working barrel in the casing divided into three cylindrical sections, the lowest section and the uppermost section having each an upwardly opening valve, a pressure operated piston operating in the lowermost section and having a tubular piston rod extending through the intermediate section and discharging into the uppermost section, a second piston on the rod and operating within the intermediate section, the lower end of the rod having an upwardly opening valve, the intermediate section of the working barrel having an inwardly opening intake valve, a discharge valve casing and an outwardly opening valve therein, two power lines one discharging into the lower end of the intermediate section and having a branch opening into the upper end of the uppermost section of the barrel, the other power line discharging into the upper end of the lower section of the barrel and having a branch opening into the discharge valve casing of the intermediate section, a storage tank, and means for forcing liquid under pressure from the storage tank alternately into one or the other of the power lines while discharging liquid from the other power line into the storage tank.

3. A deep-well pump, including three cylinders disposed one above the other and constituting three sections of a working barrel adapted to be disposed within a well casing and submerged within the liquid therein, the lowermost cylinder having an upwardly opening inlet valve at its lower end, the uppermost cylinder having an upwardly opening discharge valve at its upper end and the intermediate cylinder having an.inwardly opening intake valve at its upper end, a piston rodextending through the intermediate cylinder and into the uppermost and lowermost cylinders and carrying a pressure operated piston at its lower end and a second piston operating within the intermediate cylinder, the piston rod being tubular, an upwardly opening valve carried by the piston rod at its lower end, a powerpipe line extending from the surface of the ground into said well and opening at its lower end into the upper end of the lowermost cylinder and having a branch opening into the upper end of the intermediate cylinder, an upwardly opening valve in said branch, a second power pipe line extending down from the surface or the ground into said well and discharging into the lower end of the intermediate cylinder and having a branch opening into the upper end of the ,uppermost cylinder, a storage tank, and power operated means for forcing liquid from the storage tank alternately into one or the other of the power pipe lines and simultaneously connecting the other power pipe line with the storage tank.

4. A deep-well pump, including three cylinders disposed one above the other and constituting three sections of a working barrel adapted to be disposed within a well casing and submerged within the liquid therein, the lowermost cylinder having an upwardly opening inlet valve at its lower end, the uppermost cylinder having an upwardly opening discharge valve at its upper end and the intermediate cylinder having an inwardly opening intake valve at its upper end, a piston rod extending'through the intermediate cylinder and into the uppermost and lowermost cylinders and carrying a pressure operated piston at its lower end and a second piston operating within the intermediate cylinders, the piston rod being tubular, an upwardly opening valve t carried by the piston rod at its lower end, a power pipe line extending from the surface of the ground into said well and opening at its lower end into the upper end of the lowermost cylinder and having a branch opening into the upper end of the intermediate cylinder, an upwardly opening valve in said branch, a second power pipe line'extending down from the surface of the ground into said well and discharging into the lower end of the intermediate cylinder and having a branch opening into the upper end of the uppermost cylinder, a storage tank, a valve casing associated with the storage tank and into which the upper ends of the'pipe lines open, the valve casing having an intermediate pipe leading from the valve casing between the pipe lines into the storage tank, a power operated pump having a pumping chamber, an inlet pipe from the storage tank to the pumping chamber to the valve casing, valves controlling the inlet and outlet of'the pumping chamber, and a-power operated valve disposed within the casing and alternately connecting one of said pipe lines with the pipe leading to the storage tank and the other pipe line to the pipe leading to the pump. 1

ROBERT U. GRANT.

chamber, an outlet pipe from the pumping 

